40Cr钢渗氮过程中碳原子的迁移

将正火４０Ｃｒ钢样在不同温度下进行不同时间的气体渗氮，对其横断面进行波谱分析，发现渗氮前沿附近自始至终存在着典型的贫碳区，其两侧为富碳区，透射电镜分析结果表明，碳原子的重新分布包括碳化物的回溶、碳的扩散及碳化物长大三个过程。     

低碳低合金铸钢力学性能的研究

利用Olympus光学显微镜、扫描电镜(SEM)及能谱分析(EDAX)探讨了等温淬火工艺对低碳低合金CrMnSi铸钢力学性能的影响,并通过XRD定量分析了相的组成.结果表明,合适的等温淬火工艺,可获得一定数量的贝氏体和残余奥氏体(约6%)的复合组织,冲击断口形貌由解理刻面变为韧窝状,铸造成形无缺口试样(10 mm×10 mm×55 mm)的冲击韧度由ακ≤30 J/cm2增加至ακ≥170 J/cm2,硬度HRC≥40,具有较高硬度和冲击韧度的配合.     

碳含量对Ti(CN)基金属陶瓷力学性能的影响

研究了Ti(CN)基金属陶瓷的碳含量对其物理力学性能的影响。结果表明 ,在一定范围内 ,随着碳含量的减少 ,Ti(CN)基金属陶瓷的矫顽磁力、钴磁和硬度降低 ;而抗弯强度则明显增高。     

连续碳分CO2吸收率分析及探讨

本文简述了CO2 气体吸收率的测定原理 ,着重分析了影响连续碳分CO2 气体吸收率的因素 ,提出了提高连续碳分CO2 气体吸收率的途径     

活性炭吸附硫脲溶液中的金离子之形态

由实验得出活性炭从硫脲溶液中吸附金的特点,根据络合化学原理找到溶液中被吸附离子形态是AuTu~+,AuTu_2~+和Au~+,并解释了实验现象。     

低碳能效型水利数据中心的规划与建设

围绕对低碳能效型水利数据中心的认识与理解,从数据中心基础设施规划与建设的角度,对基本内涵、设计理念、实施方法、最佳实践、核心技术等展开分析和讨论,以期在新建或改造水利数据中心的过程中发挥一定作用,满足数据中心建设绿色环保、节能减排的要求,顺应未来新一代数据中心发展的趋势。     

Fabrication of patterned single-walled carbon nanotube films using electrophoretic deposition

Thin films of chemically functionalized single-walled carbon nanotubes (SWNTs) were fabricated by using a direct current (dc) electrophoretic deposition method. SWNTs were shortened and then functionalized with acid chloride group to combine with the amine group-terminated gold substrate. Silica nanospheres with a diameter of about 190nm were arrayed on gold substrate to pattern a thin SWNT film. Periodically patterned SWNT film was eventually produced and would be used in potential applications like electron emitters and large surface area electrodes.     

考虑天然气混氢的园区综合能源系统电制氢优化配置

电制氢和天然气混氢技术在促进可再生能源消纳、降低系统碳排放量方面具有良好的理论研究和工程应用前景。面向含高比例可再生能源的园区综合能源系统,提出一种计及天然气混氢及跨季节存储的电制氢优化配置方法。首先梳理了含氢园区综合能源系统的运行框架和能量流动关系,建立园区内部能源生产、转换与存储设备的数学模型,其次以设备的年化投资成本、园区综合能源系统的年度运行成本和碳交易成本最优为目标,提出电制氢优化配置模型。最后通过算例分析表明电制氢及天然气混氢技术的引入可提升可再生能源的消纳能力,降低系统的整体经济成本和碳排放量,并分析了电解槽投资成本、混氢体积分数上限以及经济性和低碳性成本权重系数变化对规划运行结果的影响。关键词：园区综合能源系统;电制氢;天然气混氢;碳交易;跨季节储氢;优化配置 中图分类号：TM732     

Single-Atom Metal Sites Anchored Hydrogen-Bonded Organic Frameworks for Superior “Two-In-One” Photocatalytic Reaction

Photoredox catalysis is a green solution for organics transformation and CO₂ conversion into valuable fuels, meeting the challenges of sustainable energy and environmental concerns. However, the regulation of single-atomic active sites in organic framework not only influences the photoredox performance, but also limits the understanding of the relationship for photocatalytic selective organic conversion with CO₂ valorization into one reaction system. As a prototype, different single-atomic metal (M) sites (M²⁺ = Fe²⁺, Co²⁺, Ni²⁺, Cu²⁺, and Zn²⁺) in hydrogen-bonded organic frameworks (M-HOF) backbone with bridging structure of metal-nitrogen are constructed by a typical “two-in-one” strategy for superior photocatalytic C N coupling reactions integrated with CO₂ valorization. Remarkably, Zn-HOF achieves 100% conversion of benzylamine oxidative coupling reactions, 91% selectivity of N-benzylidenebenzylamine and CO₂ conversion in one photoredox cycle. From X-ray absorption fine structure analysis and density functional theory calculations, the superior photocatalytic performance is attributed to synergic effect of atomically dispersed metal sites and HOF host, decreasing the reaction energy barriers, enhancing CO₂ adsorption and forming benzylcarbamic acid intermediate to promote the redox recycle. This work not only affords the rational design strategy of single-atom active sites in functional HOF, but also facilitates the fundamental insights upon the mechanism of versatile photoredox coupling reaction systems.     

Stabilizing Redox-Active Hexaazatriphenylene in a 2D Conductive Metal–Organic Framework for Improved Lithium Storage Performance

Organic redox-active materials are promising electrode candidates for lithium-ion batteries by virtue of their designable structure and cost-effectiveness. However, their poor electrical conductivity and high solubility in organic electrolytes limit the device's performance and practical applications. Herein, the π-conjugated nitrogen-containing heteroaromatic molecule hexaazatriphenylene (HATN) is strategically embedded with redox-active centers in the skeleton of a Cu-based 2D conductive metal–organic framework (2D c-MOF) to optimize the lithium (Li) storage performance of organic electrodes, which delivers improved specific capacity (763 mAh g⁻¹ at 300 mA g⁻¹), long-term cycling stability (≈90% capacity retention after 600 cycles at 300 mA g⁻¹), and excellent rate performance. The correlation of experimental and computational results confirms that this high Li storage performance derives from the maximum number of active sites (CN sites in the HATN unit and CO sites in the CuO₄ unit), favorable electrical conductivity, and efficient mass transfer channels. This strategy of integrating multiple redox-active moieties into the 2D c-MOF opens up a new avenue for the design of high-performance electrode materials.